Three-in-one water-based floor paint with clear bottom surface as well as preparation method and application thereof

Abstract

The invention discloses a three-in-one water-based floor paint with a clear bottom surface as well as a preparation method and application thereof. The three-in-one water-based floor paint comprises deionized water, a bactericide, a dispersant, a defoaming agent, titanium dioxide, barium sulfate, an acrylic emulsion, a coalescing agent, an organic silicon additive, a wetting agent and a thickening agent. Through the synergistic effect of all the components, the three-in-one function of primer, finish paint and varnish is achieved, and the effects of permeation, sealing and alkali resistance of the primer are achieved through first paint brushing; paint brushing is conducted for the second time, so that the pencil hardness, gloss, weather resistance and other properties of the paint film are enhanced. The construction procedures of the floor paint are reduced, the total duration is shortened, and the labor cost and the construction complexity are reduced; a single-component water-based system does not need to be blended on site and can be used immediately after being opened, so that the paint film defect caused by a multi-component mixing error is avoided; a single-tank product replaces multi-tank purchase, so that the storage and logistics cost is reduced, and various base materials such as concrete, terrazzo and ceramic tiles are compatible.

Description

Technical Field

[0001] The invention belongs to the technical field of water-based coatings, and in particular relates to a bottom surface cleaning three-in-one water-based floor paint and a preparation method and application thereof. Background Art

[0002] Traditional floor coating systems usually adopt a multi-component, multi-process construction mode, which requires the application of primer, topcoat and varnish in sequence to achieve substrate sealing, coloring decoration and surface protection functions respectively. However, this type of technology has the following significant defects: low construction efficiency, the three processes require multiple brushing and drying, the total working hours are extended, and the labor and time costs are high; performance split and compatibility risks, primer focuses on penetration sealing, topcoat focuses on coloring and hardness, varnish emphasizes wear resistance and gloss, but multiple coatings are prone to problems such as insufficient adhesion and interlayer peeling; environmental protection and safety are insufficient, solvent-based coatings contain high VOC, and some water-based coatings are environmentally friendly, but still rely on curing agents or complex additive systems, and it is difficult to balance low toxicity and high performance.

[0003] In recent years, the industry has tried to simplify the process, such as developing "primer and topcoat" coatings, but their functions are still limited to the integration of primer and topcoat, the varnish protective layer still requires additional construction, and the ability to control dynamic performance is insufficient.

[0004] In summary, there is an urgent need for a single-component, multi-effect floor coating that breaks through the limitations of traditional multiple processes through innovative formula design and process integration. While ensuring environmental protection, it achieves the integrated functions of primer penetration, topcoat coloring, and varnish protection, and has dynamic performance adjustability to adapt to diverse application scenarios. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above problems existing in the prior art, the inventor proposes the present invention.

[0007] Therefore, the purpose of the present invention is to overcome the deficiencies in the prior art and provide a bottom surface cleaning three-in-one water-based floor paint and a preparation method and application thereof.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a bottom surface cleaning three-in-one water-based floor paint, based on the mass fraction of the raw materials of the bottom surface cleaning three-in-one water-based floor paint, comprising:

[0009] 80-120 parts of deionized water, 1-3 parts of bactericide, 8-12 parts of dispersant, 1-3 parts of defoamer, 180-220 parts of titanium dioxide, 30-60 parts of barium sulfate, 520-560 parts of acrylic emulsion, 5-70 parts of film-forming aid, 3-7 parts of silicone additive, 3-7 parts of wetting agent, and 7-13 parts of thickener.

[0010] As a preferred embodiment of the bottom surface cleaning three-in-one water-based floor paint of the present invention, the acrylic emulsion is composed of acrylic emulsion 1 and acrylic emulsion 2, wherein the acrylic emulsion 1 is a silicone acrylic emulsion, and the acrylic emulsion 2 is a styrene acrylic emulsion.

[0011] As a preferred embodiment of the bottom surface cleaning three-in-one water-based floor paint of the present invention, the acrylic emulsion is calculated by weight, wherein acrylic emulsion 1 is 350 to 500 parts and acrylic emulsion 2 is 50 to 200 parts.

[0012] As a preferred embodiment of the bottom surface cleaning three-in-one water-based floor paint of the present invention, the dispersant is one or more of a modified polycarboxylate ammonium salt dispersant and a polyacrylate ammonium salt dispersant.

[0013] As a preferred embodiment of the bottom surface cleaning three-in-one water-based floor paint of the present invention, the defoaming agent is one or more of a polyether polysiloxane copolymer, a modified silicone emulsion, and a polyether modified silicone copolymer.

[0014] As a preferred embodiment of the bottom surface cleaning three-in-one water-based floor paint of the present invention, the film-forming aid is one or more of dodecyl alcohol ester and dipropylene glycol methyl ether.

[0015] As a preferred embodiment of the bottom surface cleaning three-in-one water-based floor paint of the present invention, the wetting agent is a fluorine polymer.

[0016] As a preferred embodiment of the bottom surface cleaning three-in-one water-based floor paint of the present invention, the organosilicon additive is one or more of nano-silicon dioxide modified polysiloxane and organosilicon dispersion.

[0017] Another object of the present invention is to overcome the deficiencies in the prior art and provide a method for preparing a bottom surface cleaning three-in-one water-based floor paint.

[0018] In order to solve the above technical problems, the present invention provides the following technical solutions: a preparation method of a bottom surface cleaning three-in-one water-based floor paint, comprising:

[0019] Deionized water, bactericide, defoamer, dispersant, titanium dioxide, and barium sulfate are added in sequence at a speed of 200 to 500 r / min, the speed is increased to 1000 to 1200 r / min, and the mixture is dispersed for 8 to 15 minutes to obtain the first part of slurry;

[0020] The first part of the slurry is fed into a horizontal sand mill for grinding;

[0021] Add acrylic emulsion 1 and acrylic emulsion 2 to the first part of the slurry after grinding, evenly disperse at 500-700 r / min for 10-15 minutes, then add thickener, film-forming aid and silicone aid at a stirring speed of 1000-1200 r / min, and continue stirring for 10-20 minutes.

[0022] As a preferred embodiment of the bottom surface cleaning three-in-one water-based floor paint of the present invention, the application of the bottom surface cleaning three-in-one water-based floor paint in protecting the floor from corrosion and mechanical impact is characterized in that:

[0023] Construction is done by:

[0024] Apply the floor paint on the floor surface, the first coating amount is 80-120g / m 2 ;

[0025] Apply the second coat after drying for 2-4 hours, the total coating amount is ≤240g / m 2 , forming a coating that combines the functions of primer, topcoat and varnish.

[0026] Beneficial effects of the present invention: The single-component water-based three-in-one floor paint provided by the present invention replaces the three processes of traditional primer, topcoat and varnish by two coats of painting, compared with the traditional multi-process coating. The first coat of paint is applied, which plays the role of "penetration, sealing and alkali resistance" of the primer, and also adds color at the same time, so it is not easy to leak the bottom; the second coat of paint enhances the pencil hardness, gloss, weather resistance and other properties of the paint film. The construction process of the floor paint of the present invention is reduced, the total time is shortened, and the labor cost and construction complexity are reduced; the single-component water-based system does not need to be prepared on site, and it can be used immediately after opening, avoiding paint film defects caused by multi-component mixing errors; a single-can product replaces the purchase of multiple cans, and the storage and logistics costs are reduced; and it is compatible with a variety of substrates such as concrete, terrazzo, and tiles.

[0027] In summary, the present invention solves the industry pain points of complicated processes and insufficient performance of traditional floor coatings, and has the advantages of efficient construction, high-performance output and low cost, and is suitable for diversified scenarios such as warehousing and logistics, commercial floors, and outdoor plazas. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the embodiments of the specification.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] The following examples of the present invention use raw materials as follows:

[0032] The fungicide used is K15D-L from Shanghai Sailiqi

[0033] Defoaming agent used is Digo 902W;

[0034] The dispersant used is similar to Nopco's 5027;

[0035] Titanium dioxide uses Dongjia 2377;

[0036] Barium sulfate uses Jiangxi Guangyuan 4000 mesh barium sulfate;

[0037] Acrylic emulsion 1 uses 8792 from Badfu;

[0038] Acrylic emulsion 2 uses 8508 produced by Li Wenjia;

[0039] The film-forming aid is Runtai Chemical's dodecyl alcohol ester;

[0040] The organic silicon additive is 4751 from Shenzhu

[0041] The wetting agent used is Matsuo's 4106;

[0042] The thickener used is Wanhua U905.

[0043] Example 1

[0044] This embodiment provides a method for preparing a bottom surface cleaning three-in-one water-based floor paint, specifically:

[0045] Weigh the raw materials according to the following formula:

[0046] 106 parts of deionized water, 2 parts of fungicide (chloromethylisothiazolinone), 10 parts of dispersant (ammonium salt dispersant), 2 parts of defoamer (polyether modified silicone copolymer), 200 parts of titanium dioxide (rutile), 50 parts of barium sulfate (4000 mesh precipitated barium sulfate), 450 parts of acrylic emulsion 1 (silicone acrylic emulsion), 100 parts of acrylic emulsion 2 (styrene acrylic emulsion), 60 parts of film-forming aid (alcohol fat twelve), 5 parts of silicone aid (silicone dispersion), 5 parts of wetting agent (fluorine polymer), 10 parts of thickener (polyurethane thickener);

[0047] Deionized water, bactericide, defoamer, dispersant, titanium dioxide, and barium sulfate are added in sequence at a speed of 200 to 500 r / min, the speed is increased to 1000 to 1200 r / min, and the mixture is dispersed for 8 to 15 minutes to obtain the first part of slurry;

[0048] The first part of the slurry is fed into a horizontal sand mill for grinding;

[0049] Add acrylic emulsion 1 and acrylic emulsion 2 to the first part of the slurry after grinding, evenly disperse at 500-700 r / min for 10-15 minutes, then add thickener, film-forming aid and silicone aid at a stirring speed of 1000-1200 r / min, and continue stirring for 10-20 minutes.

[0050] Example 2

[0051] The coating formula of the present embodiment is as follows:

[0052] 106 parts of deionized water, 2 parts of fungicide (chloromethylisothiazolinone), 10 parts of dispersant (ammonium salt dispersant), 2 parts of defoamer (polyether modified silicone copolymer), 200 parts of titanium dioxide (rutile), 50 parts of barium sulfate (4000 mesh precipitated barium sulfate), 350 parts of acrylic emulsion 1 (silicone acrylic emulsion), 200 parts of acrylic emulsion 2 (styrene acrylic emulsion), 60 parts of film-forming aid (alcohol fat twelve), 5 parts of silicone aid (silicone dispersion), 5 parts of wetting agent (fluorine polymer), 10 parts of thickener (polyurethane thickener);

[0053] Deionized water, bactericide, defoamer, dispersant, titanium dioxide, and barium sulfate are added in sequence at a speed of 200 to 500 r / min, the speed is increased to 1000 to 1200 r / min, and the mixture is dispersed for 8 to 15 minutes to obtain the first part of slurry;

[0054] The first part of the slurry is fed into a horizontal sand mill for grinding;

[0055] Add acrylic emulsion 1 and acrylic emulsion 2 to the first part of the slurry after grinding, evenly disperse at 500-700 r / min for 10-15 minutes, then add thickener, film-forming aid and silicone aid at a stirring speed of 1000-1200 r / min, and continue stirring for 10-20 minutes.

[0056] Example 3

[0057] The coating formula of the present embodiment is as follows:

[0058] 106 parts of deionized water, 2 parts of fungicide (chloromethylisothiazolinone), 10 parts of dispersant (ammonium salt dispersant), 2 parts of defoamer (polyether modified silicone copolymer), 200 parts of titanium dioxide (rutile), 50 parts of barium sulfate (4000 mesh precipitated barium sulfate), 500 parts of acrylic emulsion 1 (silicone acrylic emulsion), 50 parts of acrylic emulsion 2 (styrene acrylic emulsion), 60 parts of film-forming aid (alcohol fat twelve), 5 parts of silicone aid (silicone dispersion), 5 parts of wetting agent (fluorine polymer), 10 parts of thickener (polyurethane thickener);

[0059] Deionized water, bactericide, defoamer, dispersant, titanium dioxide, and barium sulfate are added in sequence at a speed of 200 to 500 r / min, the speed is increased to 1000 to 1200 r / min, and the mixture is dispersed for 8 to 15 minutes to obtain the first part of slurry;

[0060] The first part of the slurry is fed into a horizontal sand mill for grinding;

[0061] Add acrylic emulsion 1 and acrylic emulsion 2 to the first part of the slurry after grinding, evenly disperse at 500-700 r / min for 10-15 minutes, then add thickener, film-forming aid and silicone aid at a stirring speed of 1000-1200 r / min, and continue stirring for 10-20 minutes.

[0062] Table 1 shows the bottom surface cleaning three-in-one water-based floor paint of different embodiments according to the first coating amount of 80-120g / m 2 ; Apply the second coat after drying for 2-4 hours, the total coating amount is ≤240g / m 2 , the test results of the formed paint film coating performance are compared:

[0063] Table 1 Performance test of bottom surface cleaning three-in-one water-based floor paint prepared in Examples 1 to 3

[0064]

[0065]

[0066] It can be seen from the data in Table 1 that the bottom surface cleaning three-in-one water-based floor paints prepared in Examples 1 to 3 of the present invention all have good mechanical properties such as hardness and wear resistance, as well as excellent substrate permeability, anti-alkali performance and other properties.

[0067] Among them, by adjusting the ratio of acrylic emulsion 1 and acrylic emulsion 2 in Examples 2 and 3, it is not difficult to find that after the adjustment, various properties of the floor paint have changed.

[0068] Specifically, in Example 2, the amount of acrylic emulsion 1 added was reduced, and the amount of acrylic emulsion 2 added was increased. Through performance testing, it was found that when the silicone acrylic emulsion was reduced and the styrene acrylic emulsion was increased, the penetration depth increased to 2.3 cm, but the wear resistance dropped to 0.038 g (due to the reduction in cross-linking density), proving that the ratio adjustment can be directed to adapt to the loose substrate scenario, and after increasing the silicone acrylic emulsion and reducing the styrene acrylic emulsion, the water impermeability and penetration depth of the paint film decreased.

[0069] Furthermore, Badfu's 8792 is a highly cross-linked silicone-modified acrylic emulsion. The special nano-silicon material introduced allows air to enter and exit freely, while preventing water molecules from entering and exiting. It not only ensures the early water resistance of the paint film, but also gives the paint film the characteristics of rapid hardness, high wear resistance and stain resistance. The silicone segment provides resistance to UV degradation. Li Wenjia's 8508 is a styrene-acrylate copolymer. The molecular weight control technology makes it have excellent substrate permeability. The emulsion penetrates into the base layer, and its surface functional groups are formed during the film-forming process. It cross-links during the process and quickly anchors to form a dense layer, thereby achieving the effect of reinforcement and sealing. It also has good anti-alkali and bonding strength. The styrene copolymer (aromatic ring structure) absorbs ultraviolet rays and reduces yellowing of the paint film. The two are reasonably matched. The nano-silicon microporous structure of acrylic emulsion 1 and the styrene anchoring layer of acrylic emulsion 2 form a chemical bond (Si-OC bond) during film formation, avoiding the physical interface defects between traditional multi-coatings. This allows this material to have the penetration and sealing effect of the primer and the extremely high mechanical properties of the topcoat.

[0070] By adjusting the ratio, the "hardness-permeability" balance of the paint film can be controlled in a direction: high acrylic emulsion 1 ratio → topcoat performance priority (suitable for high wear-resistant scenarios); high acrylic emulsion 2 ratio → primer performance priority (suitable for loose substrate reinforcement).

[0071] Comparative Example 1

[0072] The difference between this comparative example and Example 1 is that the addition amount of acrylic emulsion 1 is reduced to 0, and the addition amount of acrylic emulsion 2 is increased to 550. The rest of the formula and preparation process are the same as those of Example 1.

[0073] Comparative Example 2

[0074] The difference between this comparative example and Example 1 is that the addition amount of acrylic emulsion 2 is reduced to 0, and the addition amount of acrylic emulsion 1 is increased to 550. The rest of the formula and preparation process are the same as those of Example 1.

[0075] The bottom surface cleaning three-in-one water-based floor paint prepared in Comparative Examples 1 and 2 was applied with a first coat of 80-120 g / m 2 , apply the second coat after drying for 2-4 hours, the total coating amount is ≤240g / m 2 The test results of the paint film coating performance are shown in Table 2.

[0076] Table 2: Bottom surface clear three-in-one water-based floor paint obtained in Comparative Examples 1 and 2

[0077]

[0078] From the performance test comparison in Table 2, it can be seen that when only styrene acrylic emulsion or only silicone acrylic emulsion is added to the floor paint, many properties of the paint film do not reach the ideal effect.

[0079] The molecular composition of styrene-acrylic emulsion is styrene-acrylate copolymer (styrene provides rigidity, acrylate provides flexibility), containing polar groups such as carboxyl (-COOH) and hydroxyl (-OH), which can be bonded to the surface of the substrate (such as Ca in concrete). 2 +, Si-OH) to form a chemical anchor, which has high permeability, low molecular weight segments (molecular weight <10,000) can quickly penetrate into the micropores of the substrate, and the acrylate flexible segments enhance fluidity, with a penetration depth of more than 200μm.

[0080] The styrene rigid chain segments are bonded to the substrate through van der Waals forces, and the carboxyl groups react with the hydroxyl groups on the surface of the substrate to form Ca-carboxylate bonds, forming a hermetic closed layer (anti-panning alkali adhesion retention rate ≥ 98%).

[0081] However, although the styrene rigid chain segment provides a certain hardness (2B pencil hardness), it lacks a high cross-linking structure and has poor wear resistance. In the test results, the wear resistance of the paint film of Comparative Example 1 decreased by nearly two times, and the scratch resistance also decreased to level 4.

[0082] The chemical composition of silicone-acrylic emulsion (Badful 8792) is silicone-modified acrylic emulsion, containing nano-silicon material (Si-O-Si three-dimensional network structure), which has a high degree of cross-linking, and nano-silicon particles serve as physical cross-linking points; high hardness and wear resistance, the nano-silicon cross-linking network restricts the movement of molecular chains, the hardness reaches 3H, and the wear resistance is 0.020. Under the action of external force, the acrylic acid segment is preferentially broken to protect the integrity of the silicon network. The hydrophobic silicon segment forms a microporous structure, which allows air to pass through but blocks liquid water.

[0083] However, nano-silicon particles tend to aggregate on the surface of the substrate and block the micropores, resulting in an incomplete sealing layer (anti-efflorescence adhesion retention rate ≤ 80%) and a penetration depth of only 1.2 cm.

[0084] However, when styrene acrylic emulsion is compounded with silicone acrylic emulsion, the two achieve functional synergy through molecular chain interpenetration + chemical bonding: the low molecular weight chain segments of the styrene acrylic emulsion quickly penetrate into the pores of the substrate, and the carboxyl groups are anchored to the substrate to form a primary closed layer; the nano-silicon particles of the silicone acrylic emulsion then fill the uncovered micropores and connect with the styrene acrylic chain segments through Si-OC bonds to form a dense hydrophobic layer.

[0085] The highly cross-linked network of silicone acrylic emulsion is interspersed in the linear chain segments of styrene acrylic emulsion to form a "rigid island-flexible sea" structure, which disperses stress under external force and avoids crack propagation.

[0086] The carboxyl group (-COOH) of the styrene acrylic emulsion reacts with the silanol group (Si-OH) of the silicone acrylic emulsion to generate Si-OC bonds, eliminating physical interface defects.

[0087] Therefore, through the three embodiments and comparative examples 1 and 2, it can be seen that the compounding of the two realizes the integration of the "primer-topcoat-clear varnish" functions through molecular-level functional complementarity and chemical bonding, and its synergistic effect far exceeds the performance upper limit of a single emulsion or a simple mixed system.

[0088] Comparative Example 3

[0089] The difference between this comparative example and Example 1 is that the amount of the organic silicon additive added is reduced to 0 parts, and the remaining steps and processes are all referred to Example 1.

[0090] The bottom surface cleaning three-in-one water-based floor paint prepared in Comparative Example 3 was tested, and the first coating amount was 80-120g / m 2 , apply the second coat after drying for 2-4 hours, the total coating amount is ≤240g / m 2 The comparative results of the paint film coating performance test are shown in Table 3.

[0091] Table 3 Bottom surface cleaning three-in-one water-based floor paint obtained in comparative example 3

[0092]

[0093] As can be seen from Table 3, the paint film without adding silicone additives (silicone dispersions) has a slight decrease in wear resistance and water impermeability, and the scratch resistance drops from level 0 to level 4. This is because the silicone dispersion is composed of nano-scale silicone microspheres (containing Si-O-Si skeletons) and surfactants. The surface of the microspheres contains hydrophobic groups (such as -Si(CH 3 ) 3), silicone microspheres migrate to the surface of the paint film to form a low surface energy layer, which improves the anti-fouling and scratch resistance. Nano-microspheres fill the micro defects of the paint film (such as shrinkage holes in acrylic emulsions), reduce capillary water absorption paths, and enhance impermeability. Without the addition of silicone dispersion, due to the lack of the "rolling lubrication" effect of silicone on the surface, the wear energy directly acts on the acrylic chain segments, so the wear resistance and scratch resistance are reduced.

[0094] Comparative Example 4

[0095] The difference between this comparative example and Example 1 is that the amount of the wetting agent added is reduced to 0, and the rest of the formula and preparation process are the same as those of Example 1.

[0096] The bottom surface cleaning three-in-one water-based floor paint prepared in Comparative Example 4 was tested, and the first coating amount was 80-120 g / m 2 , apply the second coat after drying for 2-4 hours, the total coating amount is ≤240g / m 2 The comparative results of the paint film coating performance test are shown in Table 4.

[0097] Table 4 Bottom surface cleaning three-in-one water-based floor paint obtained in comparative example 4

[0098]

[0099] It can be seen from Table 4 that without adding the wetting agent (fluorinated polymer), the penetration depth of the paint film decreased. 2 -CF 3 ), the surface tension is extremely low, much lower than that of conventional wetting agents, which can quickly reduce the contact angle of the paint on the concrete surface and ensure that the penetration depth of the first coat is ≥150μm.

[0100] It can be seen that the fluorine wetting agent ensures that the coating fully penetrates the substrate, and the silicone dispersion forms a protective layer on the surface. The two work together to achieve "three-in-one" performance through spatial partitioning. The perfluorinated chain segment of the fluorine wetting agent has a similar polarity to the hydrophobic group of the silicone, forming a continuous low-energy layer on the surface of the paint film to avoid interface defects.

[0101] Comparative Example 5

[0102] The difference between this comparative example and Example 1 is that the floor paint obtained in Example 1 is only applied in one process, and the paint film performance is tested after drying for 2-4 hours.

[0103] Comparative Example 6

[0104] In this comparative example, a commercially available one-component floor paint was selected, applied according to the construction process of the present invention, and the paint film performance was tested after drying.

[0105] Comparative Example 7

[0106] In this comparative example, a commercially available one-component floor paint was selected and applied in accordance with the existing construction method, that is, two construction steps, primer and topcoat, and the paint film performance was tested after drying.

[0107] Table 5 and Table 6 are the construction data of Comparative Examples 5, 6, and 7 and the paint film performance test data obtained after construction.

[0108] Table 5 Comparative Examples 5, 6, 7 Paint Film Construction Data

[0109]

[0110] Table 6 Test of paint film properties obtained in Comparative Examples 5, 6 and 7

[0111]

[0112] From the comparison in Table 5, it can be seen that the construction time and number of times required for Comparative Example 7 are significantly higher than those of the floor paint of the present invention. This is because the traditional floor paint construction shown in Comparative Example 7 also includes primer construction and topcoat construction, and the topcoat needs to be constructed in two coats. The final paint film thickness is also higher than 80 μm of the present invention, which affects the final VOC emissions.

[0113] At the same time, it can be seen from the performance test data in Table 6 that the paint film of the commercially available single-component floor paint in Comparative Example 6 after two coats is even inferior to the performance of the single-layer paint film of the present invention in Comparative Example 5. Therefore, the existing commercially available single-component floor paint cannot meet the relevant performance requirements of floor paint without primer and varnish construction. At the same time, compared with Comparative Example 7, when it takes more construction time and has higher VOC emissions, the various properties of the paint film finally formed are compared with our invention in pencil hardness, scratch resistance, compressive strength, etc., which are significantly lower than the paint film finally formed by the floor paint of our invention;

[0114] Furthermore, the floor paint in Comparative Example 7 involves two steps, namely, primer and varnish, so the construction time is twice that of the floor paint invented by us, and the cost in warehousing, logistics, etc. is also higher than that of the single-component floor paint invented by us, which will bring additional costs and expenses to consumers and enterprises.

[0115] Comparative Example 8

[0116] The difference between this comparative example and Example 1 is that the dispersant is adjusted to a sodium salt dispersant product "similar to Nopco 5040", and the remaining steps and processes are referred to Example 1. The paint films prepared under the conditions of different types of dispersants in this comparative example are obtained, and the relevant properties are measured and compared with Example 1. The results are shown in Table 7.

[0117] Table 7 Comparative Example 8 obtained bottom surface clear three-in-one water-based floor paint

[0118]

[0119] As shown in Table 8, after adjusting the type of dispersant, the performance of the paint film decreased to varying degrees. Specifically, the wear resistance decreased. This is because Na + It forms sodium salt (-COONa) with the carboxyl group (-COOH) of acrylic emulsion, inhibiting the crosslinking of carboxyl groups, resulting in a decrease in the crosslinking density of the paint film. At the same time, the hygroscopicity of the residual sodium salt increases the water absorption rate of the paint film from 5% to 10%, and the plasticizing effect causes the hardness to decrease. Furthermore, the sodium salt dispersant causes titanium dioxide to flocculate, blocking the pores of the substrate, reducing the penetration depth of the styrene acrylic emulsion, and weakening the anchoring effect; the sodium salt dispersant and the emulsion charge repulsion cause the system viscosity to decrease and the fluidity to decrease.

[0120] Therefore, the sodium salt dispersant in the system of the present invention will lead to a decrease in wear resistance, scratch resistance, bonding strength, gloss, water impermeability and penetration depth, the fundamental reason for which is the residual effect of sodium ions, charge repulsion and crosslinking inhibition. The use of ammonium salt dispersant in the present invention is a directional design based on volatile crosslinking promotion, charge dynamic balance and water resistance enhancement.

[0121] Comparative Example 9

[0122] The difference between this comparative example and Example 1 is that acrylic emulsion 1 is adjusted to "Sunrise" 8866 "pure acrylic emulsion", and the remaining steps and processes are all referred to Example 1. Under the conditions of different acrylic emulsions 1 in this comparative example, a paint film is obtained after compounding with acrylic emulsion 2, and the relevant properties are measured and compared with Example 1. The results are shown in Table 8.

[0123] Table 8 Comparative Example 9 obtained bottom surface cleaning three-in-one water-based floor paint

[0124]

[0125] From the above, it can be seen that the hardness, wear resistance and compressive strength of the paint film are significantly reduced, specifically, the pencil hardness drops from 2H to B grade; the wear resistance increases from 0.029g to 0.045g; the compressive strength drops from 30MPa to 20MPa; and the impermeability increases from 0.15mL to 0.21mL.

[0126] This is because the highly cross-linked Si-O-Si network of the silicone-acrylic emulsion is replaced by the linear chain segments of the pure acrylic emulsion, resulting in a decrease in the rigidity of the paint film. The molecular chain of the pure acrylic emulsion lacks the chemical bonding ability of silicone (Si-OC bond) and cannot form a dense interpenetrating network structure. At the same time, the hydrophobic silicon chain segments (Si-CH 3) and nano-microporous structures are replaced by the hydrophilic groups (such as -COOH) of pure acrylic emulsion, and water molecules can more easily penetrate through capillary action; the nano-silicon particles of silicone-acrylic emulsion act as physical cross-linking points, which can disperse external force energy (such as wear and impact); pure acrylic emulsion lacks such structures, resulting in significantly reduced wear resistance and compressive strength. Therefore, the high cross-linking network of silicone-acrylic emulsion plays a key role in improving performance.

[0127] Comparative Example 10

[0128] The difference between this comparative example and Example 1 is that the organosilicon additive is adjusted to "Yiqian's PE wax powder", and the remaining steps and processes are all referred to Example 1. The paint film prepared under the conditions of different organosilicon additives in this comparative example is obtained, and the relevant properties are measured and compared with Example 1. The results are shown in Table 9.

[0129] Table 9 Comparative Example 10 obtained bottom surface clear three-in-one water-based floor paint

[0130]

[0131] It can be seen from the table that the scratch resistance drops from level 0 to level 1; the wear resistance increases from 0.029g to 0.038g; the glossiness drops from 74 to 60; and the water impermeability increases from 0.15mL to 0.20mL.

[0132] This is because the nano-silicon microspheres in the silicone dispersion reduce the friction coefficient through the rolling effect and migrate to the surface of the paint film to form a low surface energy layer; while the wax particles only provide lubrication through physical covering, have a higher friction coefficient, and easily form a discontinuous layer on the surface of the paint film; at the same time, the silicone microspheres can fill the nano-scale pores of the paint film to block the penetration of water molecules; the wax powder cannot be effectively filled due to its large particle size, resulting in an increase in water absorption channels; the silicone microspheres are chemically bonded to the acrylic emulsion through Si-O bonds to enhance interfacial bonding; the wax powder and acrylic emulsion are only physically mixed, and the interface is easily peeled off.

[0133] Combined with the analysis of Comparative Examples 9 and 10, after replacing the silicone-acrylic emulsion with pure acrylic emulsion and the silicone dispersion with wax powder, the significant deterioration of the paint film performance is due to the loss of key molecular structure and the breaking of the synergistic chain. Example 1 achieves a dynamic balance of "rigidity-flexibility-hydrophobicity" through the highly cross-linked network of the silicone-acrylic emulsion, nano-filling and surface modification of the silicone additive.

Claims

1. A three-in-one water-based floor paint for bottom surface cleaning, characterized by: include, The three-in-one water-based floor paint for bottom surface cleaning comprises: 80-120 parts of deionized water, 1-3 parts of bactericide, 8-12 parts of dispersant, 1-3 parts of defoamer, 180-220 parts of titanium dioxide, 30-60 parts of barium sulfate, 520-560 parts of acrylic emulsion, 5-70 parts of film-forming aid, 3-7 parts of silicone additive, 3-7 parts of wetting agent, and 7-13 parts of thickener.

2. The bottom surface cleaning three-in-one water-based floor paint according to claim 1, characterized in that: The acrylic emulsion consists of acrylic emulsion 1 and acrylic emulsion 2, wherein the acrylic emulsion 1 is a silicone acrylic emulsion, and the acrylic emulsion 2 is a styrene acrylic emulsion.

3. The bottom surface cleaning three-in-one water-based floor paint according to claim 2, characterized in that: The acrylic emulsions are calculated by weight, wherein acrylic emulsion 1 is 350 to 500 parts, and acrylic emulsion 2 is 50 to 200 parts.

4. The bottom surface cleaning three-in-one water-based floor paint according to claim 1, characterized in that: The dispersant is one or more of a modified polycarboxylate ammonium salt dispersant and a polyacrylate ammonium salt dispersant.

5. The bottom surface cleaning three-in-one water-based floor paint according to claim 1, characterized in that: The defoaming agent is one or more of polyether polysiloxane copolymer, modified silicone emulsion, and polyether modified silicone copolymer.

6. The bottom surface cleaning three-in-one water-based floor paint according to claim 1, characterized in that: The organosilicon auxiliary agent is one or more of nano-silicon dioxide modified polysiloxane and organosilicon dispersion.

7. The bottom surface cleaning three-in-one water-based floor paint according to claim 1, characterized in that: The film-forming aid is one or more of dodecyl alcohol ester and dipropylene glycol methyl ether.

8. The bottom surface cleaning three-in-one water-based floor paint according to claim 1, characterized in that: The wetting agent is a fluorine polymer.

9. The method for preparing the bottom surface cleaning three-in-one water-based floor paint according to any one of claims 1 to 8, characterized in that: include, Deionized water, bactericide, defoamer, dispersant, titanium dioxide, and barium sulfate are added in sequence at a speed of 200 to 500 r / min, the speed is increased to 1000 to 1200 r / min, and the mixture is dispersed for 8 to 15 minutes to obtain the first part of slurry; The first part of the slurry is fed into a horizontal sand mill for grinding; Add acrylic emulsion 1 and acrylic emulsion 2 to the first part of the slurry after grinding, evenly disperse at 500-700 r / min for 10-15 minutes, then add thickener, film-forming aid and silicone aid at a stirring speed of 1000-1200 r / min, and continue stirring for 10-20 minutes.

10. The use of the bottom surface cleaning three-in-one water-based floor paint as claimed in any one of claims 1 to 8 to protect the floor from corrosion and mechanical impact, characterized in that: Construction is done by: Apply the floor paint on the floor surface, the first coating amount is 80-120g / m 2 ; Apply the second coat after drying for 2-4 hours, the total coating amount is ≤240g / m 2 , forming a coating that combines the functions of primer, topcoat and varnish.

Images